Question

find the product: 1) (pq-2r) (pq-2r)
solve it by this method
2r(pq-2r)+pq(pq-2r)
answer is p²q²-4pqr+4r²
solve and send ​

Answer 1

Step-by-step explanation:

The question is expressed as (a-b)(a-b) or (a-b)²

we know that (a-b)² = a²-2ab + b²

so,

(pq-2r) (pq-2r)= (pq-2r)²

=》 (pq)² -2(pq×2r) + (2r)²

=》p²q²- 4pqr + 4r²